Permutation lock



S. W. CRADDOCK.

PERMUTATI-O N LOCK. APPLICATION FILED MAY 6. 192i.

Patented June 6,1922

2 SHEETS-SHEET 2.

If 22.- 7. z! 20 22/ V. M 0004A;

if INVENTOR.

I "1 BY A T TORNE Y.v

s. w. CRADDOCK.

. PEBMUTATION LOCK APPLICATION FILED MAY 6,0182].

Patented June 6, 1922,

2 SHEETS-SHEET l.

INVENTOR;

A TT ORNE Y.

s'rszax w. cnannocmor' BIGFLAND, mssou'nx.

rn'nmu'rairzon noon.

To all 'tvhom it may concern:

Be it known that I, STARK W. CnADDocK, I a citizen of the United-,States, residing at .t1on changing means,

Richland, in the county of Pulaski and State of Missouri, useful Improvements in Permutation Locks, of which the following is a specification.

This invention relates generally to permutation locks for securing the doors of steel safes and vaults against'being opened by unauthorized persdns and has for its. principalv objecjt to arrange the parts of the mechanism in such a manner that no jar, click, or noise whatever can be heard or felt during the operation of the tumbler disks'thereby' preventing persons relying on. sensitive fingersor sounds from ascertaining the combination and opening the lock.

Another object of the invention is to generally improve upon locks. of this.

character by providing a device which will be of extremely simple, durable and" inexpensive construction, one which may be easily, assembled and disassembled and is e'flicient and reliable in operation, and well adapted to the purpose for which it isdesigned.

With these and numerous other objects in view, the invention resides in certain novel features of construction, and the combination and arrangement of parts as hereinafter fully described and claimed.

In the drawing Figure 1 is an elevational viewof the lock showing same asused with the bolting mechanism, a

Figure 2 is a front elevation of the lock,

Figure 3 is a rear elevation thereof, Figure 4 is a vertical section taken through the lock,

Figure 5 is a rear elevational view of a block used with the lock, 1

Figure 6 is an end elevation thereof, b

Figure 7 is a section taken therethroug'h, on line 7 7 of Figure 5, v

Figure 8 is an edge elevational view of the bolt operating mechanism parts thereof be-J' ingrshown in. section,

latch, i

Figures 10, 11, 12, 13, and 14 are plan views of the tumbler disks,

Figure 1 5 is a planview of the washer,

. Specification of Letters Patent. Application filed my 6,-192'1. Serial no, 467,321.

have invented certain new and will be the position shown in gure 9 is a perspective view of the sliding block used in connection with the Patented June 6,1922.

Figure 16 is a plan view of the end disk for enclosing the tumbler disks,

Figure 17 is a plan view of the permuta- Figure 18 1s a plan of the flange 46, and

Figure '19 is a section taken on the line. 19-19 of Figure 17 Referring to the'drawings in detail it Wlll be seen that 1 ,designates the horizontally disposed locking bolts which are .usually found on a 'safe door and are connected by the vertical strip 2. A link 3 connects the strip 2 with the bolt 4 which extends through the casing an r opening 6 extendin 5 of the lock ad acent its upper end and is provided with igure-4. This bolt 4 is also provided with a pair of stop plns 7 so as to limit its transverse sliding movements I -The bolt operating mechanism 8 includes the semi-circular body 9 having a radially extending finger 10 which is positioned in the opening 6. This bolt operating mechanism is mounted on suitable bearings 8' and rotated by the square shaft 11 which extends through the semi-circular member-Qiand is provided at one end with an operatin handle 12 so that the same may be rotate The screw 1.3 or other suitable means'holds I the shaft 11 in detachable engagement with the member 9; Upon rotation of the body,

9 by the handle 12 through the intermediacy of'the shaft 11 the finger 10 maybe moved so as to slide the bolt 4 and thereby actuate the bolts 1 through link 3 and strip. 2. An apertured bracket 1a is mounted in the casing 5 a distance from the intermediaoy of the.

the shaft Hand is adapted topivot in the casing. This bracket 14 slidably receives in its aperture the rod 15 which is pivotally connected to the body 9 at 16.

l8 'is disposed between the bracket 14 and the pivot point 16 and is suitably fixed to the rod 15 at 19 so that when the finger 10 is in a vertical position the spring 18 will be com.-

p'ressed whereas when the finger 710 is in l4 will be extended and tendt'o hold the body 9 in this osition. Should the body 9 be rotated,'in

position this spring 18 will tend to hol Figure 4 the spring,"

igure l, in a clockwise direc-- tion so as to place the 'bolt in an unlocking this bolt 4 in its unlocked position through the intermediacy of the bolt operating mechanism 8 as will be evident from an inspection of the drawings.

The body 9'is provided with a notch 20 at its lower end in which is slidably mounted a latch block-21- which is shown to ad- 'vantage in Figure 9. A longitudinally extending cylindrical! bore 22 communicates with the notch 20.50 23 of .the latch block 21 and as indicated in Figure 4 there is a coil spring mounted thereon which will bear against the end of this shank 23 so as to normally hold the lower end of the latch block 21 in alignment with the curved periphery of the body 9. In order the block 21 and its shank 23, this shank is provided with ing slot 24 which receives thepin 25 carried in the block 21. On the one face of the block 21 there. is provided a projection 26 having a vertical slot 27 therein. This projection is slidable in the groove 28 in the vertical wall of the notch 20 and a pin extends transversely of this groove 28'and passes through the slot 7'as shown at 29 in Figure 4. The body 9 f the bolt operating mechanism 8 is provided with a circular groove 30 on each side which is preferably concentric with its curved periphery. These grooves 30 may be of any length but it is preferable to havethem of approximately ninety-five degrees. The grooves" 31 on the side faces of thBt latch block 21 normally register with the grooves 30 that is when the pm with the upper end 'of the slot 24. The grooves 31 are concentric with the lower face 32 of the latch block 21 and it willbe noted that this lower face 32 is beveled upwardly posite that upon whichis mounted the projection 26.

The latch mechanism just described is operated and controlled bya permutation mechanism later to be described through the lntermediacy of the lever 33 "which is pivotally mounted in a groove on the upper side of a block ,34which' is positioned 1n the body of the casing 5'. The construction of this lever 33 is best shown in- Figures 5 and 6 wherein it will be seen that 21 depending tongue 34 extends from the under face ofthe lever adjacent its free' end while a pair of arms 35 extend upwardlyfrom the upper face of the lever and are spaced from each other and provided I p with the inwardly extending and'aligning ted lines in Figure 6.

grooves 31 and 30 upon lugs 36 which are "adapted'to ride in the rotation ofthe bolt operatmgmechamsm' '8." On the lower edge provided a lug 37 which is indicated in dot- The permutation mechanismabout to be described 1s similar to that disclosedin my as to receive the shank to limit the sliding movement of a longitudinally extendtoward the side op-.

tpngue 34 I there is pending application for a permutation lock Serial Number 435,400 filed January 6, 1921. The knob 38 is provided with, the usual indices as indicated in Figure 2 and is mounted on or made part of the shank 39 which is provided with a reduced extension indicated by the dotted lines in Figure 7 at 40. This reduced stem extends through the block 34 so as to be centrally located in the cylindrical recess 41. The rear portion of this recess41 is open while the other end thereof is closed as is shown at.43 except for the opening through which a reduced portion 44 of the shank 39 is rotatably mounted. Channels 45 are disposed in the recess 41 and. are preferably diametrically disposed in relation to each other.

A sleeve 42 is mounted on the stem 40 so as ,to be capable of rotation independently thereof and is provided upon its outer end with a flange 46 which is provided with av plurality of apertures. A locking disk 47 screw. 48. This disk 47 is providedwith a plurality of circumferentially arranged apertures which are adapted to be registered with the apertures provided in the flange 46 so that this disk 47 maybe suitably locked to the disk 46 by means of the screw 49 and thus the combination of the permutation mechanism may be changed when desired as 4 .is suitably keyed to the end of thestem 4O and held in engagement therewith by a positioned in place and this washer, see Figure 15, consists of a body portion having a segment thereof removed and is provided with an enlarged central opening'53'and the diametrically opposed apertured ears 54 which are received by the bolts 55 mounted in the channels 45 and in the forward 'portion of the block 34. The remaining tumbler disks D, C. B, and'A are placed in position. in the order named having mounted therebetween a washer G that each of the disks E, D.,-C, B, and A are provided with the-central"circular opening 51 and the rib engaging groove 52. The washers G are spaced fromv each other by means of the spacing sleeves 56 mounted'on the bolts 55. It will be noted that the size A to E gradu of the groove 52 in the disks ally decreases in the order mentioned. closure disk F is provided with the circular centrally located opening 57 and the diametrically opposed apertured ears 58 en- The and it will be noted gaged by the bolts 55. The end of the sleeve 42 will be received in the opening 57 and it will be noted that a groove 59 is provided in order that the sleeve 42 may be placed on the stem '40 the rib 5O riding in'the groove 59. After the closure disk 57 has been placed in position the bolts 55 will be passed through the apertures in ears 54 and 58 and through spacing sleeves 56. The sleeve 42 may-now be placed in position and the flange 46 thereof will be keyed to the stem 40 through the intermediacy of the disk 47 as has already been explained. It will benoted that each of the tumbler disks is provided with a peripheral notch 60 which when aligned with Jeach other are adapted to receivethetongue 34 of the lever 33. The innermost disk E is provided with a plurality of shallow peripheral notches 61 suitably spaced from each other which are adapted to receive the lug 37 on tongue 34.

The operation of the device should now be understood. The object to be obtained when it is desired to open the lock is to move the tumbler disks A- .to E so that the peripheral notches 60 will be in alignment with each thirty nine.

other and with the tongue 34,,it being understood that the tongue 34 is adapted to penetrate through the block 34 into therecess 41 when the lever 33 is pushed downwardly. This aligning of the peripheral notches 60 is accomplished through rotation ofthe knob 38 back and forth placing the necessary indices thereon in alignment with the mark sixty five on the casing 5. Supposing for example that the combination is zero, eighty seven, twenty one, sixty two and The knob 38 will now be rotated in a clockwise direction for 'at least one full turn and thenc'ontinued until the index zero is in alignment with the mark sixty five. This operation will. cause the rib to engage one end of the groove 52in the tumbler disk A so as to place its peripheral notch 60 in alignment with the tongue 34.

. The knob 38 will now be rotated in a c'oim;

ter-clockwise direction until the index eighty seven aligns with the mark 65jand this movement will cause the rib 50 to engage the end of the groove 52 in tumbler disk B thereby aligning its peripheral notch with the tongue 34 and in thus rotating the knob 38 it will be noted that the disk A will not have moved since its groove 52 is greater than the r roove '52 in tumbler disk C. The knob 38 will now be rotated in a clockwise direction so as to placethe index twenty one-in alignment with the mark sixty five and in t is movement the peripheral notch 60 will be placed in alignment with the tongue 34 in a manner similarto that set forthin connec tion withtumbler disks A and B.' The knob .38 will now be rotated in a counter-clock- 'wise direction so as to place the index sixty two in alignment-with the mark sixty five -not in alignment might hear or feel wise direction so that the index thirty nine on the knob 38 registers with the mark which will place the peripheral notch 60 of the disk E inalignment with the tongue. At

' this tim it will-beeasily understood that by changing the position ;of the disk 47 in relation to the flange 46 the combination may be changed from time totime as may be de- .sired. 7 7 When the peripheral notches 60 are all in alignment with the tongue 34 it will be seen "that by rotating the handle '12- in a counter clockwise direction the bolt operating mechanism may be rotated at which time the pins 36. on the arms 35 on the lever 33 will ride in the grooves 31 of the latch block 21 ,and into the. groove-3O on the body 9-. If however, the peripheral notches 60 were he noted that upon rotation of the bolt operating mechanism 8 the latch block 21 would be forced inwardlyand the, tongue or arm, end of the lever 33 would abut against the face of the notch 20 provided with the with the tongue 34 it 'will groeve 28 and prevent further rotation of the bolt operating mechanism. In this sli'ght rotation of the bolt operating mechanism it will be noted that the bolt 4 would not be moved since the opening 6 is lar e enough to allow a slight movement of tie finger 10 therein. i v

As is well known unauthorized persons desiring to operate a lock mechanism 'of the nature now under consideration,

21 because of their slanting position .willtend to bear upon the pins 36 thus pushing downwardly upon the lever 33 and causing the lug 37 to engage one of the shallow peripheral notches 61 and prevent 'furtherrotation. of the knob 38 and thus the-only possible click which would be that occasioned by the. lug 37 engaging the peripheral notches 61' and 60 of the disk E which would in no way aid him in discovering the proper combination.

the advantages I method of operation willbe readily apparent to those skilled in the art to the unauthorized person.

which the v usually turn the handle 38. slightly so that they may invention appertains and while I have described the principle of operation of the.

invention together with the device which I now consider to be the best embodiment thereof, I desire to have it understood the.

. 120 From thefore oing description, taken in connection with-t e accompanying drawings, of the construction and the the device shown is merely illustrative and I that such changes may be made as are within the scope of the claimed invention.

Having thus described my'invention what I claim as new is:-

1. In combination, a bolt, a bolt operating mechanism therefor, said mechanism including a body provided with a semi-circular groove, means for rotating the body, a block slidably mounted in relation to the bolt operating mechanism and carried thereby provided with a groove normally adapted to register with the groove in the body of the latch mechanism, an element for preventing the rotation 'ofthe body normally positioned in the groove of the block and slidable in both of said grooves, means provided for moving the block so as to place its groove out of alignment with the groove in the body thereby preventing rotation of the bod in the manner and for the ,purpose specific 2. In combination, a bolt, an operating mechanism therefor,'including a body provided with a groove, a block slidably mount; ed in the body and provided with a groove adapted to normally register with the groove of the body, means for resiliently holding said block so that its groove will register with the groove in the body, a lever pivotallv mounted and provided with an element slidable in both of said grooves but normally positionedwithin the groove of the, block,

' and means for controlling the .lever so as to rotation of said body.

place said grooes in or out of alignment with each other so, as to allow'or prevent the 3. In combination, a bolt, an operating mechanism therefor including a rotatable body, means for rotating the body, said body provided with a groove, a, member slidably mounted on the;body and provided with a groove,,mea'ns provided for normally holding the groove in the member in alignment with thegroove in'the body,-a lever provided with an element slidable in the grooves, a tongue projecting from the lever, a permutation mechanism comprising a plurality of tumbler disks provided with peripheral notches, the edge of said tongue adapted to terminate adjacent the periphery of the tumbler disks so as to normally prevent the movement of said lever, and means for rotating the tumbler disks so as to place the peripheral notches thereof in alignment with V the tongue so as to allow movement of the lever and rotation of the bolt operating mechanism. I

4. In combination, a bolt, an operating mechanism therefor including a rotatable body, said body provided with a notch and a groove communicating therewith, a block slidably mounted in said notch and provided with a groove, means for normally holding the block in such a position that its groove will register with the groove of the body, an element slidable in said grooves, and means controlling said element so that the groove of the block may be placed out of alignment with the groove in the .body thereby preventing the operation of the bolt operating mechanism In testimony whereof I affix my signature inpresence of two witnesses.

I STARK W. ORAD'DOCK.

Witnesses:

HENRY P. FOSTENBERRY, WALTER D. DAVIS. 

